So the website says:
Hold the Private key, Keystore or Mnemonic Phrase:
We have found it was dangerous for people to import their private key into our website wallet or Meta Mask fork plugin to get EtherZero,so we will provide users a custom node to be added to MEW or Meta Mask to get ETZ, or you can add your notes.
Do not hold the Private key, Keystore or Mnemonic Phrase:
If your Ethereum is kept in a trading platform or those wallets which do not support the private key derivation, you can ask the trading platform or wallet to get EtherZero for you. The users can contact the trading platform or wallet providers, and ask how to process it.
Any (official) update?
edit:
Perhaps twitter?
https://twitter.com/EtherZero_org/status/954304089831034880Well, I guess that if the are adding a custom node to MEW this should be safe for people to redeem the ETZ, am I right? I don't know how exactly the node thing works, is there anyone with more technical skills who would answer?
I have technical skills and I can assure you this project is not trustworthy until they release any source code, their github is a joke I audited their code and basically they did nothing more than change name to the ethereum code, when you fork the code you need to specify a new network ID, they didn't share that network ID with the community so probably they didn't even do a real fork, we cannot verify because all they have working to support them is their obscure "etherzero.org" server, could be easily a fake rpc server generating blocks, do you understand the blockchain concepts? The most basic is the node concept, they didn't release any valid node address to work with. Behind the "etherzero.org" could be anything, virus, bot, proxy, whatever you can imagine, even propietary and centralized projects have more information about their technology or code to convince people to use their product.
So... my veredict?
BIG SCAM